The Frequency of the HF broadcast is directly assigned within the DRM+ SDR app with two settings
1. Frequency in Hertz
2. RF Gain (0-512)

Demonstration video showing Clean DRM decode of AAC Audio and Journaline data along with live metadata. (our signal was very strong, so only a short wire used for Antenna, DX’rs will need an appropriate Antenna)

Now anyone with a smartphone and a $20 SDR can receive DRM 30 HF broadcasts…

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5 thoughts on “DRM30 on a Smartphone: KTWR Shows Us The Way”

You should have a test station always on day and night in SW (or in MW), which always sends the same announcement in various languages (English, Italian, German, Romanian, Chinese, French …) in DRM30, so that we can test our SDR RTL2832u receivers, IF downconverter, and be able to test them try if they work well.

Not many people are aware of this. But when the iPhone was conceived at the end of 2004. The original design team, which is different now. Actually looked at DRM as it only was the matter of adding the decoding chip, but passed as back then as now there is no market. Apple wasn’t the only one. Samsung also considered it, but didn’t see any value to it. I only know then from an interview I did with Danny Coster who was part of the original design team who left Apple in 2016.

They even in 2006 had a presentation team from the DRM Consortium give them a presentation. But after they researched themselves an could not find a consumer product from any major manufacture or even content. The idea was axed.

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